1 | MODULE geo2ocean |
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2 | !!====================================================================== |
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3 | !! *** MODULE geo2ocean *** |
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4 | !! Ocean mesh : ??? |
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5 | !!===================================================================== |
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6 | |
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7 | !!---------------------------------------------------------------------- |
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8 | !! repcmo : |
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9 | !! angle : |
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10 | !! geo2oce : |
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11 | !! repere : old routine suppress it ??? |
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12 | !!---------------------------------------------------------------------- |
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13 | !! * Modules used |
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14 | USE dom_oce ! mesh and scale factors |
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15 | USE phycst ! physical constants |
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16 | USE in_out_manager ! I/O manager |
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17 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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18 | |
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19 | IMPLICIT NONE |
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20 | |
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21 | !! * Accessibility |
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22 | PRIVATE |
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23 | PUBLIC repcmo ! routine called by ???.F90 |
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24 | PUBLIC geo2oce ! routine called by ???.F90 |
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25 | PUBLIC repere ! routine called by ???.F90 |
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26 | |
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27 | !! * Module variables |
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28 | REAL(wp), DIMENSION(jpi,jpj) :: & |
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29 | gsinu , gcosu , & ! matrix element for change grid u (repcmo.F) |
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30 | gsinv , gcosv , & ! matrix element for change grid v (repcmo.F) |
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31 | gsinus, gcosin ! matrix element for change grid (repere.F) |
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32 | |
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33 | !! * Substitutions |
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34 | # include "vectopt_loop_substitute.h90" |
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35 | !!--------------------------------------------------------------------------------- |
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36 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
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37 | !! $Header$ |
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38 | !! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt |
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39 | !!--------------------------------------------------------------------------------- |
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40 | |
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41 | CONTAINS |
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42 | |
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43 | SUBROUTINE repcmo ( pxu1, pyu1, pxv1, pyv1, & |
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44 | px2 , py2 , kt ) |
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45 | !!---------------------------------------------------------------------- |
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46 | !! *** ROUTINE repcmo *** |
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47 | !! |
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48 | !! ** Purpose : Change vector componantes from a geographic grid to a |
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49 | !! stretched coordinates grid. |
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50 | !! |
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51 | !! ** Method : Initialization of arrays at the first call. |
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52 | !! |
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53 | !! ** Action : - px2 : first componante (defined at u point) |
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54 | !! - py2 : second componante (defined at v point) |
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55 | !! |
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56 | !! History : |
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57 | !! 7.0 ! 07-96 (O. Marti) Original code |
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58 | !! 8.5 ! 02-08 (G. Madec) F90: Free form |
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59 | !!---------------------------------------------------------------------- |
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60 | !! * Arguments |
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61 | INTEGER, INTENT( in ) :: & |
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62 | kt ! ocean time-step |
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63 | REAL(wp), INTENT( in ), DIMENSION(jpi,jpj) :: & |
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64 | pxu1, pyu1, & ! geographic vector componantes at u-point |
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65 | pxv1, pyv1 ! geographic vector componantes at v-point |
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66 | REAL(wp), INTENT( out ), DIMENSION(jpi,jpj) :: & |
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67 | px2, & ! i-componante (defined at u-point) |
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68 | py2 ! j-componante (defined at v-point) |
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69 | !!---------------------------------------------------------------------- |
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70 | |
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71 | |
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72 | ! Initialization of gsin* and gcos* at first call |
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73 | ! ----------------------------------------------- |
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74 | |
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75 | IF( kt <= nit000 + 1 ) THEN |
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76 | IF(lwp) WRITE(numout,*) |
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77 | IF(lwp) WRITE(numout,*) 'repcmo : use the geographic to stretched' |
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78 | IF(lwp) WRITE(numout,*) ' ~~~~~ coordinate transformation' |
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79 | |
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80 | CALL angle ! initialization of the transformation |
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81 | ENDIF |
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82 | |
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83 | ! Change from geographic to stretched coordinate |
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84 | ! ---------------------------------------------- |
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85 | |
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86 | px2(:,:) = pxu1(:,:) * gcosu(:,:) + pyu1(:,:) * gsinu(:,:) |
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87 | py2(:,:) = pyv1(:,:) * gcosv(:,:) - pxv1(:,:) * gsinv(:,:) |
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88 | |
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89 | END SUBROUTINE repcmo |
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90 | |
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91 | |
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92 | SUBROUTINE angle |
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93 | !!---------------------------------------------------------------------- |
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94 | !! *** ROUTINE angle *** |
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95 | !! |
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96 | !! ** Purpose : Compute angles between model grid lines and the |
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97 | !! direction of the North |
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98 | !! |
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99 | !! ** Method : |
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100 | !! |
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101 | !! ** Action : Compute (gsinu, gcosu, gsinv, gcosv) arrays: sinus and |
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102 | !! cosinus of the angle between the north-south axe and the |
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103 | !! j-direction at u and v-points |
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104 | !! |
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105 | !! History : |
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106 | !! 7.0 ! 96-07 (O. Marti) Original code |
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107 | !! 8.0 ! 98-06 (G. Madec) |
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108 | !! 8.5 ! 98-06 (G. Madec) Free form, F90 + opt. |
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109 | !!---------------------------------------------------------------------- |
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110 | !! * local declarations |
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111 | INTEGER :: ji, jj ! dummy loop indices |
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112 | |
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113 | REAL(wp) :: & |
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114 | zlam, zphi, & ! temporary scalars |
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115 | zlan, zphh, & ! " " |
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116 | zxnpu, zxnpv , znnpu, & ! " " |
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117 | zynpu, zynpv , znnpv, & ! " " |
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118 | zxffu, zmnpfu, zxffv, & ! " " |
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119 | zyffu, zmnpfv, zyffv ! " " |
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120 | !!---------------------------------------------------------------------- |
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121 | |
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122 | ! ============================= ! |
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123 | ! Compute the cosinus and sinus ! |
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124 | ! ============================= ! |
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125 | ! (computation done on the north stereographic polar plane) |
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126 | |
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127 | DO jj = 2, jpj |
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128 | !CDIR NOVERRCHK |
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129 | DO ji = fs_2, jpi ! vector opt. |
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130 | |
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131 | ! north pole direction & modulous (at u-point) |
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132 | zlam = glamu(ji,jj) |
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133 | zphi = gphiu(ji,jj) |
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134 | zxnpu = 0. - 2. * COS( rad*zlam ) * TAN( rpi/4. - rad*zphi/2. ) |
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135 | zynpu = 0. - 2. * SIN( rad*zlam ) * TAN( rpi/4. - rad*zphi/2. ) |
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136 | znnpu = zxnpu*zxnpu + zynpu*zynpu |
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137 | |
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138 | ! north pole direction & modulous (at v-point) |
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139 | zlam = glamv(ji,jj) |
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140 | zphi = gphiv(ji,jj) |
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141 | zxnpv = 0. - 2. * COS( rad*zlam ) * TAN( rpi/4. - rad*zphi/2. ) |
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142 | zynpv = 0. - 2. * SIN( rad*zlam ) * TAN( rpi/4. - rad*zphi/2. ) |
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143 | znnpv = zxnpv*zxnpv + zynpv*zynpv |
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144 | |
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145 | ! j-direction: f-point segment direction (u-point) |
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146 | zlam = glamf(ji,jj ) |
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147 | zphi = gphif(ji,jj ) |
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148 | zlan = glamf(ji,jj-1) |
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149 | zphh = gphif(ji,jj-1) |
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150 | zxffu = 2. * COS( rad*zlam ) * TAN( rpi/4. - rad*zphi/2. ) & |
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151 | & - 2. * COS( rad*zlan ) * TAN( rpi/4. - rad*zphh/2. ) |
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152 | zyffu = 2. * SIN( rad*zlam ) * TAN( rpi/4. - rad*zphi/2. ) & |
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153 | & - 2. * SIN( rad*zlan ) * TAN( rpi/4. - rad*zphh/2. ) |
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154 | zmnpfu = SQRT ( znnpu * ( zxffu*zxffu + zyffu*zyffu ) ) |
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155 | zmnpfu = MAX( zmnpfu, 1.e-14 ) |
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156 | |
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157 | ! i-direction: f-point segment direction (v-point) |
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158 | zlam = glamf(ji ,jj) |
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159 | zphi = gphif(ji ,jj) |
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160 | zlan = glamf(ji-1,jj) |
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161 | zphh = gphif(ji-1,jj) |
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162 | zxffv = 2. * COS( rad*zlam ) * TAN( rpi/4. - rad*zphi/2. ) & |
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163 | & - 2. * COS( rad*zlan ) * TAN( rpi/4. - rad*zphh/2. ) |
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164 | zyffv = 2. * SIN( rad*zlam ) * TAN( rpi/4. - rad*zphi/2. ) & |
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165 | & - 2. * SIN( rad*zlan ) * TAN( rpi/4. - rad*zphh/2. ) |
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166 | zmnpfv = SQRT ( znnpv * ( zxffv*zxffv + zyffv*zyffv ) ) |
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167 | zmnpfv = MAX( zmnpfv, 1.e-14 ) |
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168 | |
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169 | ! cosinus and sinus using scalar and vectorial products |
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170 | gsinu(ji,jj) = ( zxnpu*zyffu - zynpu*zxffu ) / zmnpfu |
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171 | gcosu(ji,jj) = ( zxnpu*zxffu + zynpu*zyffu ) / zmnpfu |
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172 | |
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173 | ! cosinus and sinus using scalar and vectorial products |
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174 | ! (caution, rotation of 90 degres) |
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175 | gsinv(ji,jj) = ( zxnpv*zxffv + zynpv*zyffv ) / zmnpfv |
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176 | gcosv(ji,jj) =-( zxnpv*zyffv - zynpv*zxffv ) / zmnpfv |
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177 | |
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178 | END DO |
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179 | END DO |
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180 | |
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181 | ! =============== ! |
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182 | ! Geographic mesh ! |
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183 | ! =============== ! |
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184 | |
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185 | DO jj = 2, jpj |
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186 | DO ji = fs_2, jpi ! vector opt. |
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187 | IF( ABS( glamf(ji,jj) - glamf(ji,jj-1) ) < 1.e-8 ) THEN |
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188 | gsinu(ji,jj) = 0. |
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189 | gcosu(ji,jj) = 1. |
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190 | ENDIF |
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191 | IF( ABS( gphif(ji,jj) - gphif(ji-1,jj) ) < 1.e-8 ) THEN |
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192 | gsinv(ji,jj) = 0. |
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193 | gcosv(ji,jj) = 1. |
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194 | ENDIF |
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195 | END DO |
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196 | END DO |
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197 | |
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198 | ! =========================== ! |
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199 | ! Lateral boundary conditions ! |
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200 | ! =========================== ! |
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201 | |
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202 | ! lateral boundary cond.: U-, V-pts, sgn |
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203 | CALL lbc_lnk ( gsinu, 'U', -1. ) ; CALL lbc_lnk( gsinv, 'V', -1. ) |
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204 | CALL lbc_lnk ( gcosu, 'U', -1. ) ; CALL lbc_lnk( gcosv, 'V', -1. ) |
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205 | |
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206 | END SUBROUTINE angle |
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207 | |
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208 | |
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209 | SUBROUTINE geo2oce ( pxx , pyy , pzz, cgrid, & |
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210 | plon, plat, pte, ptn , ptv ) |
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211 | !!---------------------------------------------------------------------- |
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212 | !! *** ROUTINE geo2oce *** |
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213 | !! |
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214 | !! ** Purpose : |
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215 | !! |
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216 | !! ** Method : Change wind stress from geocentric to east/north |
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217 | !! |
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218 | !! History : |
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219 | !! ! (O. Marti) Original code |
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220 | !! ! 91-03 (G. Madec) |
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221 | !! ! 92-07 (M. Imbard) |
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222 | !! ! 99-11 (M. Imbard) NetCDF format with IOIPSL |
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223 | !! ! 00-08 (D. Ludicone) Reduced section at Bab el Mandeb |
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224 | !! 8.5 ! 02-06 (G. Madec) F90: Free form |
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225 | !!---------------------------------------------------------------------- |
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226 | !! * Local declarations |
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227 | REAL(wp), INTENT( in ), DIMENSION(jpi,jpj) :: & |
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228 | pxx, pyy, pzz |
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229 | CHARACTER (len=1), INTENT( in) :: & |
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230 | cgrid |
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231 | REAL(wp), INTENT( in ), DIMENSION(jpi,jpj) :: & |
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232 | plon, plat |
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233 | REAL(wp), INTENT(out), DIMENSION(jpi,jpj) :: & |
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234 | pte, ptn, ptv |
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235 | REAL(wp), PARAMETER :: rpi = 3.141592653E0 |
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236 | REAL(wp), PARAMETER :: rad = rpi / 180.e0 |
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237 | |
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238 | !! * Local variables |
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239 | INTEGER :: ig ! |
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240 | |
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241 | !! * Local save |
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242 | REAL(wp), SAVE, DIMENSION(jpi,jpj,4) :: & |
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243 | zsinlon, zcoslon, & |
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244 | zsinlat, zcoslat |
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245 | LOGICAL, SAVE, DIMENSION (4) :: & |
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246 | linit = .FALSE. |
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247 | !!---------------------------------------------------------------------- |
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248 | |
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249 | SELECT CASE( cgrid) |
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250 | |
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251 | CASE ( 't' ) ;; ig = 1 |
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252 | CASE ( 'u' ) ;; ig = 2 |
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253 | CASE ( 'v' ) ;; ig = 3 |
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254 | CASE ( 'f' ) ;; ig = 4 |
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255 | |
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256 | CASE default |
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257 | IF(lwp) WRITE(numout,cform_err) |
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258 | IF(lwp) WRITE(numout,*) 'geo2oce : bad grid argument : ', cgrid |
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259 | nstop = nstop + 1 |
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260 | END SELECT |
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261 | |
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262 | IF( .NOT. linit(ig) ) THEN |
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263 | zsinlon (:,:,ig) = SIN (rad * plon) |
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264 | zcoslon (:,:,ig) = COS (rad * plon) |
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265 | zsinlat (:,:,ig) = SIN (rad * plat) |
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266 | zcoslat (:,:,ig) = COS (rad * plat) |
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267 | linit (ig) = .TRUE. |
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268 | ENDIF |
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269 | |
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270 | pte = - zsinlon (:,:,ig) * pxx + zcoslon (:,:,ig) * pyy |
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271 | ptn = - zcoslon (:,:,ig) * zsinlat (:,:,ig) * pxx & |
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272 | - zsinlon (:,:,ig) * zsinlat (:,:,ig) * pyy & |
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273 | + zcoslat (:,:,ig) * pzz |
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274 | ptv = zcoslon (:,:,ig) * zcoslat (:,:,ig) * pxx & |
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275 | + zsinlon (:,:,ig) * zcoslat (:,:,ig) * pyy & |
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276 | + zsinlat (:,:,ig) * pzz |
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277 | |
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278 | END SUBROUTINE geo2oce |
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279 | |
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280 | |
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281 | SUBROUTINE repere ( px1, py1, px2, py2, kchoix ) |
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282 | !!---------------------------------------------------------------------- |
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283 | !! *** ROUTINE repere *** |
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284 | !! |
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285 | !! ** Purpose : Change vector componantes between a geopgraphic grid |
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286 | !! and a stretched coordinates grid. |
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287 | !! |
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288 | !! ** Method : initialization of arrays at the first call. |
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289 | !! |
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290 | !! ** Action : |
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291 | !! |
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292 | !! History : |
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293 | !! ! 89-03 (O. Marti) original code |
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294 | !! ! 92-02 (M. Imbard) |
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295 | !! ! 93-03 (M. Guyon) symetrical conditions |
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296 | !! ! 98-05 (B. Blanke) |
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297 | !! 8.5 ! 02-08 (G. Madec) F90: Free form |
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298 | !!---------------------------------------------------------------------- |
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299 | !! * Arguments |
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300 | REAL(wp), INTENT( in ), DIMENSION(jpi,jpj) :: & |
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301 | px1, py1 ! two horizontal components to be rotated |
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302 | REAL(wp), INTENT( out ), DIMENSION(jpi,jpj) :: & |
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303 | px2, py2 ! the two horizontal components in the model repere |
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304 | INTEGER, INTENT( inout ) :: & |
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305 | kchoix ! type of transformation |
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306 | ! = 1 change from geographic to model grid. |
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307 | ! =-1 change from model to geographic grid |
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308 | ! = 0 same as the previous call |
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309 | !! * Local declarations |
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310 | INTEGER, SAVE :: nmem |
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311 | |
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312 | INTEGER :: ji, jj ! dummy loop indices |
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313 | |
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314 | REAL(wp) :: zxx, zcof1, zcof2, & |
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315 | ze1t, ze2t |
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316 | REAL(wp), DIMENSION(jpi,jpj) :: & |
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317 | zlamdu, zphiu, & |
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318 | zlamdv, zphiv |
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319 | !!---------------------------------------------------------------------- |
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320 | |
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321 | |
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322 | ! 0. Initialization of gsinus and gcosin IF first call |
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323 | ! ---------------------------------------------------- |
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324 | |
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325 | ! 0.1 control argument |
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326 | |
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327 | IF( kchoix == 0 ) THEN |
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328 | IF( nmem == 0 ) THEN |
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329 | IF(lwp) WRITE(numout,cform_err) |
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330 | IF(lwp) WRITE(numout,*) 'repere : e r r o r in kchoix : ', kchoix |
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331 | IF(lwp) WRITE(numout,*) ' for the first call , you must indicate ' |
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332 | IF(lwp) WRITE(numout,*) ' the direction of change ' |
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333 | IF(lwp) WRITE(numout,*) ' kchoix = 1 geo --> stretched ' |
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334 | IF(lwp) WRITE(numout,*) ' kchoix =-1 stretched --> geo ' |
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335 | nstop = nstop + 1 |
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336 | ELSE |
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337 | kchoix = nmem |
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338 | ENDIF |
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339 | ELSEIF( kchoix == 1 .OR. kchoix == -1 ) THEN |
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340 | nmem = kchoix |
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341 | ELSE |
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342 | IF(lwp) WRITE(numout,cform_err) |
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343 | IF(lwp) WRITE(numout,*) 'repere : e r r o r in kchoix : ', kchoix |
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344 | IF(lwp) WRITE(numout,*) ' kchoix must be equal to -1, 0 or 1 ' |
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345 | nstop = nstop + 1 |
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346 | ENDIF |
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347 | |
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348 | ! 0.2 Initialization |
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349 | |
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350 | zxx = gsinus(jpi/2,jpj/2)**2+gcosin(jpi/2,jpj/2)**2 |
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351 | IF( zxx <= 0.1 ) THEN |
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352 | IF(lwp) WRITE(numout,*) 'repere : initialization ' |
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353 | DO jj = 1, jpj |
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354 | DO ji = 2, jpi |
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355 | zlamdu(ji,jj) = glamu(ji,jj) - glamu(ji-1,jj) |
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356 | zlamdu(ji,jj) = ASIN( SIN( rad*zlamdu(ji,jj) ) )/rad |
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357 | zphiu (ji,jj) = gphiu(ji,jj) - gphiu(ji-1,jj) |
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358 | END DO |
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359 | END DO |
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360 | DO jj = 2, jpj |
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361 | zlamdv(:,jj) = glamv(:,jj)-glamv(:,jj-1) |
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362 | zlamdv(:,jj) = ASIN(SIN(rad*zlamdv(:,jj)))/rad |
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363 | zphiv (:,jj) = gphiv(:,jj)-gphiv(:,jj-1) |
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364 | END DO |
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365 | |
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366 | ! 0.3 Boudary conditions and periodicity |
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367 | |
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368 | IF( nperio == 1 .OR.nperio == 4.OR.nperio == 6 ) THEN |
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369 | DO jj = 1, jpj |
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370 | zlamdu(1,jj) = zlamdu(jpim1,jj) |
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371 | zphiu (1,jj) = zphiu (jpim1,jj) |
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372 | END DO |
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373 | ELSE |
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374 | DO jj = 1, jpj |
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375 | zlamdu(1,jj) = zlamdu(2,jj) |
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376 | zphiu (1,jj) = zphiu (2,jj) |
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377 | END DO |
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378 | ENDIF |
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379 | |
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380 | DO ji = 1, jpi |
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381 | zlamdv(ji,1) = zlamdv(ji,2) |
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382 | zphiv (ji,1) = zphiv (ji,2) |
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383 | END DO |
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384 | |
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385 | IF( nperio == 2 ) THEN |
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386 | DO ji = 1, jpi |
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387 | zphiv (ji,1) = zphiv (ji,3) |
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388 | END DO |
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389 | ENDIF |
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390 | |
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391 | ! 0.4 gsinus gcosin |
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392 | |
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393 | !CDIR NOVERRCHK |
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394 | DO jj = 1, jpj |
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395 | !CDIR NOVERRCHK |
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396 | DO ji = 1, jpi |
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397 | zcof1 = rad * ra * COS( rad * gphit(ji,jj) ) |
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398 | zcof2 = rad * ra |
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399 | zlamdu(ji,jj) = zlamdu(ji,jj) * zcof1 |
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400 | zlamdv(ji,jj) = zlamdv(ji,jj) * zcof1 |
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401 | zphiu (ji,jj) = zphiu (ji,jj) * zcof2 |
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402 | zphiv (ji,jj) = zphiv (ji,jj) * zcof2 |
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403 | END DO |
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404 | END DO |
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405 | |
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406 | !CDIR NOVERRCHK |
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407 | DO jj = 1, jpj |
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408 | !CDIR NOVERRCHK |
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409 | DO ji = 1, jpi |
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410 | ze1t = SQRT( zlamdu(ji,jj)*zlamdu(ji,jj) + zphiu(ji,jj)*zphiu(ji,jj) ) |
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411 | ze2t = SQRT( zlamdv(ji,jj)*zlamdv(ji,jj) + zphiv(ji,jj)*zphiv(ji,jj) ) |
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412 | gsinus(ji,jj) = 0.5*( zphiu(ji,jj)/ze1t - zlamdv(ji,jj)/ze2t ) |
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413 | gcosin(ji,jj) = 0.5*( zphiv(ji,jj)/ze2t + zlamdu(ji,jj)/ze1t ) |
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414 | END DO |
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415 | END DO |
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416 | CALL lbc_lnk( gsinus, 'T', -1. ) |
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417 | CALL lbc_lnk( gcosin, 'T', -1. ) |
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418 | |
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419 | ENDIF |
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420 | |
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421 | |
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422 | ! 1. Change from geographic to tretched |
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423 | ! ------------------------------------- |
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424 | |
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425 | IF( kchoix == 1 ) THEN |
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426 | px2(:,:) = px1(:,:) * gcosin(:,:) + py1(:,:) * gsinus(:,:) |
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427 | py2(:,:) = -px1(:,:) * gsinus(:,:) + py1(:,:) * gcosin(:,:) |
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428 | ENDIF |
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429 | |
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430 | |
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431 | ! 2. Change from tretched to geographic |
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432 | ! ------------------------------------- |
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433 | |
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434 | IF( kchoix == -1 ) THEN |
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435 | px2(:,:) = px1(:,:) * gcosin(:,:) - py1(:,:) * gsinus(:,:) |
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436 | py2(:,:) = px1(:,:) * gsinus(:,:) + py1(:,:) * gcosin(:,:) |
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437 | ENDIF |
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438 | |
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439 | END SUBROUTINE repere |
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440 | |
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441 | !!====================================================================== |
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442 | END MODULE geo2ocean |
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